You may often need to mirror all (or part) of a website for offline analysis. The ‘wget’ program has some easy features to use when you want to quickly get a local copy of a site and correct common issues (like links pointing to server locations). Set up one of these behind the scenes while you work on other aspects, then peruse at your leisure.
Update 2018-07-21: Or just use the script I wrote to simplify this for my customized Kali build, available here.
Hermit's Cave 